Bicycle frame



FIG. 1 is a side elevational view of the bicycle frame showing our newdesign, taken from the right side thereof;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view taken from the left side thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The ornamental design for a bicycle frame, as shown and described.